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What the developers use for a physics engine is up to the developer. If a developer is willing to go through the "growing pains" of getting another physics engine going on GPU then they still have that option. Nobody is blocking them from doing so. Nvidia also contributes to openCL and probably has the best implementation of it out there along with some of the best documentation. They are not forcing anybody to use Cuda or Physx, that is the choice of the developer. If you don't like the developer using Physx then complain to the developer.

"What the developers use for a physics engine is up to the developer."

i don't think so.. nvidia pay for using physX---

developers just use what brings the most cash..

"Nobody is blocking them from doing so."

i think nvidia is blocking.

and they pay for max damange on other companys.

"Nvidia also contributes to openCL and probably has the best implementation of it out there along with some of the best documentation."

documentation? can you give me the spec of a gtx480 ?

"They are not forcing anybody to use Cuda or Physx,"

they Pay this is a kind of force the force of the Profit and money-

"that is the choice of the developer."

the choice? i don't think so no other company pays for bullshit like nivida.

this choice just hurts entusers and force them to buy nvidia hardware.

One thing as well, where nvidia is concerned, OpenCL is a layer on top of the CUDA driver interface. Without Cuda, no openCL on nvidia, C for CUDA and OpenCL are simply two ways of accessing the capabilities as is DirectCompute, another vender specific, albeit software vender this time and AMD supports it as well. So it looks like AMD is "feeding" and other "evil empire" and supporting it as well.